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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '112fb66f0a6c8a846d3c12de2940f91365910d74767c9aec6fea4ee4fa182d5e' 
  AND token = 's68ojm/Czngy2OiW+la/dBBduTU5IJX837GdQOQ8A4E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00134

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}